http: don't destroy completed request
Calling destroy() on a completed ClientRequest, i.e. once 'close' will be emitted should be a noop. Also before emitting 'close' destroyed === true.
Fixes: https://github.com/nodejs/node/issues/32851
Checklist
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make -j4 test
(UNIX), orvcbuild test
(Windows) passes -
tests and/or benchmarks are included -
documentation is changed or added -
commit message follows commit guidelines